An alternative biorefinery approach to address microalgal seasonality: blending with spent coffee grounds

2020 ◽  
Vol 4 (7) ◽  
pp. 3400-3408 ◽  
Author(s):  
Andre Prates Pereira ◽  
Tao Dong ◽  
Eric P. Knoshaug ◽  
Nick Nagle ◽  
Ryan Spiller ◽  
...  
Keyword(s):  
Hydrothermal Liquefaction ◽  
Spent Coffee Grounds ◽  
Carbohydrate Fraction ◽  
Coffee Grounds ◽  
Fuels And Chemicals

An effective method for the production of fuels and chemicals from microalgae is to ferment the carbohydrate fraction, extract the lipids and convert the resulting solids through hydrothermal liquefaction (HTL).

Hydrothermal liquefaction of spent coffee grounds followed by biocatalytic upgradation to produce biofuel: a circular economy approach

Biofuels ◽  
2021 ◽  
pp. 1-10
Author(s):  
Louis Christiaan Muller ◽  
Jaco Pearson ◽  
Jaco Louw ◽  
Sanette Marx ◽  
Sanjib Kumar Karmee
Keyword(s):  
Circular Economy ◽  
Hydrothermal Liquefaction ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

scholarly journals Hydrothermal liquefaction of spent coffee grounds in water medium for bio-oil production

2016 ◽  
Vol 86 ◽  
pp. 191-198 ◽  
Author(s):  
Linxi Yang ◽  
Laleh Nazari ◽  
Zhongshun Yuan ◽  
Kenneth Corscadden ◽  
Chunbao (Charles) Xu ◽  
...  
Keyword(s):  
Oil Production ◽  
Hydrothermal Liquefaction ◽  
Water Medium ◽  
Spent Coffee Grounds ◽  
Coffee Grounds ◽  
Bio Oil

scholarly journals A Comparative Study on Thermochemical Valorization Routes for Spent Coffee Grounds

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3840
Author(s):  
Jie Yang ◽  
Hao Chen ◽  
Haibo Niu ◽  
Josiah McNutt ◽  
Quan He
Keyword(s):  
Oil Extraction ◽  
Hydrothermal Liquefaction ◽  
Biodiesel Production ◽  
Optimal Conditions ◽  
Spent Coffee Grounds ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Coffee Grounds ◽  
Biodiesel Synthesis ◽  
Biochemical Compositions

Extracting oil from spent coffee grounds (SCG) for biodiesel production has recently attracted much research interest. Large amounts of organic solvents are involved for oil extraction and biodiesel synthesis. Hydrothermal liquefaction (HTL) is an emerging thermochemical technology with great potential for biocrude production from a broad range of feedstocks. This study attempted to compare two SCG valorization options: route 1, oil extraction for biodiesel production followed by HTL of defatted SCG; and route 2, direct HTL of raw SCG. The microwave-assisted extraction conditions were optimized to effectively remove oil from SCG using response surface methodology. Under optimal conditions, an SCG oil yield of 8.4 wt.% could be achieved. HTL of defatted SCG generated less biocrude (18.9 wt.%) than that of raw SCG (28.1 wt.%). The biochemical compositions of resultant biocrudes were largely different from each other. The life cycle assessment was conducted on each of the SCG valorization routes and showed that the greenhouse gas emissions from direct HTL of raw SCG were only 35% of the other valorization route, suggesting that direct HTL is a favorable valorization route for SCG within this study’s scope.

Anaerobic digestion of hydrothermal liquefaction wastewater from spent coffee grounds

2021 ◽  
Vol 148 ◽  
pp. 106030
Author(s):  
M.E. Dias ◽  
G.H.D. Oliveira ◽  
P.T. Couto ◽  
K.J. Dussán ◽  
M. Zaiat ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Hydrothermal Liquefaction ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

MW ‐assisted hydrothermal liquefaction of spent coffee grounds

2021 ◽  
Author(s):  
Jie Yang ◽  
Haibo Niu ◽  
Kenneth Corscadden ◽  
Quan He ◽  
Ningning Zhou
Keyword(s):  
Hydrothermal Liquefaction ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

scholarly journals An integrated biorefinery to produce 5-(hydroxymethyl)furfural and alternative fuel precursors from macroalgae and spent coffee grounds

2021 ◽  
Author(s):  
André Prates Pereira ◽  
Timothy J. Woodman ◽  
Christopher J. Chuck
Keyword(s):  
Alternative Fuel ◽  
Hydrothermal Liquefaction ◽  
Spent Coffee Grounds ◽  
Integrated Biorefinery ◽  
Hydroxymethyl Furfural ◽  
Coffee Grounds

In this study an integrated biorefinery is presented, producing 5-hydroxymethylfurfural (HMF) and products from the hydrothermal liquefaction of spent coffee grounds blended with macroalgae.

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